J/AJ/143/144ivo://CDS.VizieR/J/AJ/143/144doi:10.26093/cds/vizier.51430144CDSSmith B.J.Swartz D.A.Miller O.Burleson J.A.Nowak M.A.Struck C.2017-11-10T11:16:22Z2013-07-30T08:01:56ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frx-ray-sourcesgalaxiesinfrared-sourcesstellar-spectral-typesWe have conducted a statistical analysis of the ultra-luminous X-ray point sources (ULXs; L_X_>=10^39^erg/s) in a sample of galaxies selected from the Arp Atlas of Peculiar Galaxies (1996, Cat. VII/192; Webb, 1996, Cat. VII/192). We find a possible enhancement of a factor of ~2-4 in the number of ULXs per blue luminosity for the strongly interacting subset. Such an enhancement would be expected if ULX production is related to star formation, as interacting galaxies tend to have enhanced star formation rates on average. For most of the Arp galaxies in our sample, the total number of ULXs compared to the far-infrared luminosity is consistent with values found earlier for spiral galaxies. This suggests that for these galaxies, ULXs trace recent star formation. However, for the most infrared-luminous galaxies, we find a deficiency of ULXs compared to the infrared luminosity. For these very infrared-luminous galaxies, active galactic nuclei may contribute to powering the far-infrared; alternatively, ULXs may be highly obscured in the X-ray in these galaxies and therefore not detected by these Chandra observations. We determined local UV/optical colors within the galaxies in the vicinity of the candidate ULXs using Galaxy Evolution Explorer UV and Sloan Digitized Sky Survey optical images. In most cases, the distributions of colors are similar to the global colors of interacting galaxies. However, the u-g and r-i colors at the ULX locations tend to be bluer on average than these global colors, suggesting that ULXs are preferentially found in regions with young stellar populations. In the Arp sample there is a possible enhancement of a factor of ~2-5 in the fraction of galactic nuclei that are X-ray-bright compared to more normal spirals.2012AJ....143..144Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/144CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2013)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)VII/74 : Atlas of Peculiar Galaxies (Arp 1966): redshiftsVII/192 : Arp's Peculiar Galaxies (Webb 1996)II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)J/ApJ/741/49 : ULX candidates in nearby galaxies (Swartz+, 2011)J/AJ/140/1975 : Normal spiral galaxies optical & UV photometry (Smith+, 2010)J/AJ/139/1212 : SDSS photometry of interacting galaxies (Smith+, 2010)J/ApJ/687/471 : Observational comparison between ULXs & XRBs (Berghea+, 2008)J/ApJ/664/458 : Spectral fit of ULX sources (Devi+, 2007)J/AJ/133/791 : Spitzer phot. of normal & interacting galaxies (Smith+, 2007)J/A+A/452/739 : ULX sources and FIRST radio sources (Sanchez-Sutil+, 2006)J/ApJ/649/730 : ULX population in nearby galaxies from XMM (Winter+, 2006)J/A+A/429/1125 : Catalog of Ultraluminous X-ray sources (Liu+, 2005)J/ApJS/157/59 : Ultraluminous X-ray sources in nearby galaxies (Liu+, 2005)J/AJ/127/3235 : HIRES atlas of all RBGS galaxies (Surace+, 2004)J/ApJS/154/519 : Properties of ultraluminous X-ray candidates (Swartz+, 2004)J/A+A/422/941 : Gas content in 1038 interacting galaxies (Casasola+, 2004)J/MNRAS/344/134 : Chandra ultraluminous X-ray sources (Humphrey+, 2003)http://ned.ipac.caltech.edu/level5/Arp/frames.html : On-line Arp atlas ofhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/144https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/143/144/table1 (Interacting galaxy sample for ULX study and available chandra data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/144/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/144/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/144/table1?GETtext/xml+votable180.050000true170.062512.9916670.0055555555555555566/4439 4447 4718 4993 5196 5241 5504 5793 5799 5966 5976 5989 6034 6042 6047 6098 7606 8492 8673 10465 10628 10752 10761 10900 10905 11180 11434 11832 13511 17492 17754 19432 19678 22828 23215 26028 27643 27719 27767 27907 27937 27955 28147 28167 28173https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/143/144?format=asciiX-rayOpticalInfrareddefaultJ/AJ/143/144/table1Interacting galaxy sample for ULX study and available chandra datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintArpArp system numbermeta.id;meta.mainintprimaryf_ArpFlag on Name (e=In the strongly interacting subset; see Section 6)meta.codecharGalObserved galaxy name (1)meta.idcharSpTNuclear spectral typesrc.spTypecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainDist[3.9/129] Distance (2)Mpcpos.distance;pos.heliocentricfloatDiam[0-9.* ] Angular diameter (3)arcminphys.angSizecharl_logLFIRUpper limit on logLFIRmeta.code.errorcharlogLFIR[7.98/12.03]? Log of total 42.4-122.5{mu}m far-infrared luminosity (logL_FIR_)log(solLum)phys.luminosity;em.IRfloatnullablef_logLFIR[d] Flag on LFIR (d=in the IRAS sample; see Section 7)meta.codecharChExpChandra exposure timekstime.duration;obs.exposurefloatlog(Lx)[36.98/39.98] Log of the 0.5-8keV X-ray point-source luminosity detection limit corresponding to the Chandra exposure time (L_X_ limit) (in units of erg/s)log(1e-07W)phys.luminosity;em.X-rayfloatArrayChandra array (ACIS-I or ACIS-S)meta.id;instrcharSetChandra data set numbermeta.number;phys.atmol.numberintExpFUV? GALEX FUV exposure timestime.duration;obs.exposure;em.UV.FUVintnullableExpNUV? GALEX NUV exposure timestime.duration;obs.exposureintnullableXDisplay the X-ray luminosity for this ULX candidate or nuclear X-ray source (table2)meta.ref.urlcharW96Display the imaging data and the involved galaxies from Webb 1996, Cat. VII/192meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/AJ/143/144/table2List of ULX candidates and nuclear X-ray sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintArpArp system numbermeta.id;meta.mainintLocX-ray sources location relative to optical features (disk, nuclear or tidal) (see section 3.2 for more details)pos.eqcharCXOCXO name (JHHMMSS.s+DDMMSS) (1)meta.idcharLx[1/296.9] 0.5-8keV X-ray luminosities (in 10^39^erg/s)1e+32Wphys.luminosity;em.X-rayfloatSrceOptical source? ("yes" or blank)meta.codecharSampleSample (I or S) (2)src.samplechar